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kirill115
2 months ago
15

The 2015 American Time Use survey contains data on how many minutes of sleep per night each of 10,900 survey participants estima

ted they get. The times follow the Normal distribution with mean 529.9 minutes and standard deviation 135.6 minutes. An SRS of 100 of the participants has a mean time of x¯=514.4 minutes. A second SRS of size 100 has mean x¯=539.3 minutes. After many SRSs, the values of the sample mean x¯ follow the Normal distribution with mean 529.9 minutes and standard deviation 13.56 minutes.(a) What is the population?A. The population is 135.6 million respondents to the American Time Use Survey.B. The population is the 100 participants in the SRS.C. The population is the 10,900 respondents to the American Time Use Survey.D. The population is all Americans who sleep through the night.
Mathematics
1 answer:
PIT_PIT [12.4K]2 months ago
4 0
C. The population consists of 10,900 participants in the American Time Use Survey. In statistics, population refers to a substantial group with shared characteristics, while a sample is a smaller subset extracted from it. The 2015 survey data indicates that each respondent estimates their nightly sleep duration, with a simple random sample of 100 participants reporting an average sleep time of x¯=514.4 minutes. Therefore, the population is defined as the 10,900 individuals responding to the survey.
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Answer:

one hour.

Step-by-step explanation:

by subtracting 24 from 36, you arrive at 12, which when multiplied by 5 gives you 60. 60 minutes equals one hour.

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6 0
1 month ago
On a coordinate plane, 2 exponential fuctions are shown. Function f (x) decreases from quadrant 2 into quadrant 1 and approaches
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Answer:

g(x)=6(3)^x

Step-by-step explanation:

We are provided with the information that

f(x)=6(\frac{1}{3})^x

Function f is decreasing as it moves from quadrant 2 to quadrant 1, tending towards y=0

It intersects the y-axis at the point (0,6) and goes through (1,2).

Function g(x) also approaches y=0 in quadrant 2, but increases in quadrant 1.

It passes through (-1,2) and crosses the y-axis at (0,6).

Reflection across y-axis:

The transformation rule is identified as

(x,y)\rightarrow (-x,y)

Applying this rule, we derive

g(x)=6(\frac{1}{3})^{-x}=6(3)^x

Then, by substituting

x^{-a}=\frac{1}{x^a}

for x=-1

g(-1)=6\times (\frac{1}{3})=2

for x=0

g(0)=6

Consequently,g(x)=6(3)^x holds true.

8 0
2 months ago
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Congruent angles have the same measurement.

Let’s evaluate the provided pairs one by one.

A. ∠MKR and ∠OAR

In the diagram, it’s visible that the angle bisector of the right-angled vertices creates angles MKR and OAR.

Thus, they are congruent measuring 45°

B. ∠ONT and ∠MTN

From the diagram, MTN forms a right angle, while ONT is created by bisecting this right angle.

Hence, these angles are not congruent with ∠MTN at 90° and ∠ONT at 45°

C. ∠IRS and ∠MRO

In the diagram, MRO is a right-angle, while IRS results from the bisection of the right angle.

Accordingly, these angles are not congruent with ∠MRO equal to 90° and ∠IRS at 45°

D. ∠URC and ∠TRO

In the diagram, it’s shown that the angle bisector of the right-angled vertices forms angles URC and TRO.

Thus, they are congruent, both measuring 45°

Therefore, the pairs of congruent angles are

A. ∠MKR and ∠OAR and D. ∠URC and ∠TRO

8 0
2 months ago
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